期刊
SURFACE & COATINGS TECHNOLOGY
卷 353, 期 -, 页码 8-17出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2018.08.072
关键词
WS2/MoS2 multilayer film; Nano-scale; Microstructure; Wear; Space environment
资金
- China National Natural Science Foundation [51575508, 51575509, 51505465]
Characteristic porous microstructure causes poor wear resistances of sputtered transition metal dichalcogenides (TMDs) films that have important applications in space technology. TMDs/metal multilayer films exhibit improved microstructural and tribological properties, but which are unreliable due to the mismatch in thermal/mechanical properties between them as well as the metal sensibility to atomic oxygen (AO). In this study, MoS2/WS2 nano-scale multilayer films were fabricated to improve the microstructural, mechanical, tribological and environment-adaptive properties of TMDs films. Results revealed that as compared with MoS2 or WS2 single layer film, the multilayer film exhibited a dense microstructure, strong (002) texture and high hardness. Correspondingly, it showed a significantly improved wear resistance in vacuum, whose wear life was similar to one order longer than those of single-layer films. Simulation tests revealed that even drastic thermal shock could not cause the delamination of multilayer film, which was observed from TMDs/metal multilayer system; and the oxidation from AO irradiation was restricted into film surface layer (<= 10 nm). These results indicated that the micro structural, mechanical and tribological properties of TMDs films were significantly improved by the nano-scale multilayer design, and the fabricated multilayer film had potential applications in space technology.
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